"Smell is the most powerful trigger to the memory there is. A certain flower or a whiff of smoke can bring up experiences long forgotten. Books smell. Musty and, and, and, and rich. The knowledge gained from a computer, is, it ... it has no texture, no context. It's there and then it's gone. If it's to last, then the getting of knowledge should be tangible, it should be, um... smelly." - Giles, BtVS

while i do not share Giles' technophobia, I like that. :)